Cashout Page
Firstly, navigate to the Cashout page. You can find this on the left hand side of the website. Head to the “Withdraw Skins” section and find the CS 2 option.
Next, you’ll need to enter your Steam Trade Address in the field above all of the visible skins, seen here:
To find your steam trade URL, follow these steps.
Log into Steam Client and open your Inventory.
Click the "Trade Offers" button on the right.
Click on "Who can send me Trade Offers".
Once you’ve done this, all you need to do now is find the skin you want to withdraw, select it, and hit the big green “Withdraw” button.
If you cancel the trade instead of accepting it, you will receive your coins back automatically, in rare cases this can take up to an hour.